I would argue that it is falsifiable. What I think you are looking for is verifiable and repeatable. It took almost 30 years to verify Einstien. He said about the collection of a hundred papers trying to prove he is wrong, "you only need one paper to prove it wrong."

It's a therotical paper. Leave it to the expermentaliats to design a test to prove it right. Diffraction gratings prove QED. Right. Feynman's biographer said that.